[maciej]

F6 will only generate robot program of a Program in RoboDK and not a script. I have noted it down and will forward this to our Dev guys to see if this needs to be changed or not.

You should try to remove most of your code in your Python script and try generating the robot program again. Make sure you have the robot.MoveJ instruction in your script. There is some part in your script which is not running properly on your system.
Let me know how it goes.

Thanks, Vineet for your help.
I do agree there is something not working properly on my RDK system. I did reduce python code, used robot.MoveJ instruction but don't think this is the way to resolve the problem. We need to find the root cause rather than tweaking the code so it suddenly starts working again - without understanding what's going wrong. There isn't a problem with the code (the same code worked before and generated perfect src output). The problem is somewhere in the system and I'm seeking the way to diagnose it and fix it. Again - playing with python code is not the way (I did however as you asked but no results).
有可能完全重置RoboDK设施tion? Or remove some temporary files, clean registry, etc. I did try standard Windows uninstall and reinstallation but the problem still persists. Is there any log/debug files I can generate so you can review to trace the problem?

Many thanks for all your help so far.